Choose the statement $(s)$ where the underlined word is used correctly:

1. A $\underline{\text{prone}}$ is a dried plum.
2. He was lying $\underline{\text{prone}}$ on the floor.
3. People who eat a lot of fat are $\underline{\text{prone}}$ to heart disease.
1. $\text{(i)}$ and $\text{(iii)}$ only
2. $\text{(iii)}$ only
3. $\text{(i)}$ and $\text{(ii)}$ only
4. $\text{(ii)}$ and $\text{(iii)}$ only